11. A cool and moist air mass will spread into the Northwest, bringing spotty showers. 12. A disturbance will bring a few showers to the Southwest while dry conditions cover most of the Northwest. 13. A giant whirlpool of chilly air will cross the West Coast, bringing scattered showers to California. 14. A low pressure system will swirl into the Northwest, bringing valley showers along with mountain snow. 15. A new low pressure system will form in the eastern Plains, bringing snow showers to the eastern Dakotas and Minnesota. 16. A surge of moisture will cross the Northwest, bringing showers to the Pacific coast and plenty of clouds to interior sections. 17. A warm front pushing into the Pacific Northwest will bring showers west of the Cascades from central Oregon to the Olympic peninsula. 18. A weak disturbance intercepting a flow of humid air from the Gulf will bring scattered showers to Texas and the lower Mississippi Valley. 19. A small disturbance along an extension of the front will bring chilly showers to parts of Pennsylvania and southern New England. 20. A vigorous disturbance will bring scattered showers to southern Arizona and the deserts of southeast California. |